questions about Firefox vs. IE Options

[gelionie]

I recently switched my browser from IE to Firefox.

I have a birthday countdown and a extra left module, which worked on IE, but no longer work on Firefox.

Can anyone explain to me why this is happening?
And is there a way to fix it?

I'm not quite familar with the ways different browsers handle javascripts etc.

XANGA: http://www.xanga.com/niez_cho

Thanks! :)

[gelionie]

Oddly, I still don't see the module showing up in Firefox. :\

Here is my code:

CODE

<!-- Left Side Modules : Paul Chen -->
<div id="customLeft" style="display:none">
<!-- module:start -->
<table class="left" cellSpacing="0" cellPadding="4" width="100%" border="1">
<tr><th class="left" vAlign="top" align="left">
The time now is...
</th></tr>

<tr><td class="left" vAlign="top">
<embed src="http://www.clocklink.com/clocks/5006-LightBlue.swf?TimeZone=CCT" width="200" height="120" wmode="transparent" type="application/x-shockwave-flash"><br/>
</td></tr>
</table>
<br/>
<!-- module:end -->
</div>
<script>
var sbpc = document.getElementById('customLeft');
var myForm = document.getElementById('__aspnetForm');
var leftSide = sbpc.cloneNode(true);
leftSide.style.display = "block";
if(!document.all){
range = document.createRange();
range.selectNode(myForm);
range.insertNode(leftSide);}
else{myForm.insertAdjacentElement('afterEnd', leftSide);}
</script>
<!-- Left Side Modules : Paul Chen -->